<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<div id="father">
  <h1>标题</h1>
  <p id="p1">p1</p>
  <p class="p2">p2</p>
</div>

<script>
  //对应css的选择器
  let self=document.getElementById('p1');
  let father=self.parentElement;
  father.removeChild(self);
</script>
</body>
</html>